Computer Security Lecture 4.1: DES Supplementary Material

Computer Security Lecture 4.1: DES Supplementary Material

Benha University

http://www.bu.edu.eg

We will discuss the following: Data Encryption Standard, DES Algorithm, DES Key Creation

https://www.youtube.com/watch?v=1-lF4dePpts&list=PLKYmvyjH53q13_6aS4VwgXU0Nb_4sjwuf

4604d1f123000533847758729b23db6c?s=128

Mohamed Loey

October 30, 2017
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Transcript

  1. DES Supplementary Material DES Supplementary Material

  2. DES Supplementary Material Initial permutation Round 1 Round 2 Round

    16 32 bit Swap Final permutation 64-bit Plain text 64-bit Cipher text Permuted choice 1 Left Circular Shift Left Circular Shift Left Circular Shift 64-bit Key Permuted choice 2 Permuted choice 2 Permuted choice 2 56 bit 56 bit 56 bit 56 bit 56 bit 56 bit 48 bit 48 bit 48 bit K1 K2 K16 64 bit 64 bit 64 bit 64 bit 64 bit
  3. DES Supplementary Material Permuted choice 1 Left Circular Shift Left

    Circular Shift Left Circular Shift 64-bit Key Permuted choice 2 Permuted choice 2 Permuted choice 2 56 bit 56 bit 56 bit 56 bit 56 bit 56 bit 48 bit 48 bit 48 bit K1 K2 K16
  4. DES Supplementary Material Permuted choice 1 Left Circular Shift Left

    Circular Shift Left Circular Shift 64-bit Key Permuted choice 2 Permuted choice 2 Permuted choice 2 56 bit 56 bit 56 bit 56 bit 56 bit 56 bit 48 bit 48 bit 48 bit K1 K2 K16
  5. DES Supplementary Material 57 49 41 33 25 17 9

    1 58 50 42 34 26 18 10 2 59 51 43 35 27 19 11 3 60 52 44 36 63 55 47 39 31 23 15 7 62 54 46 38 30 22 14 6 61 53 45 37 29 21 13 5 28 20 12 4
  6. DES Supplementary Material Permuted choice 1 Left Circular Shift Left

    Circular Shift Left Circular Shift 64-bit Key Permuted choice 2 Permuted choice 2 Permuted choice 2 56 bit 56 bit 56 bit 56 bit 56 bit 56 bit 48 bit 48 bit 48 bit K1 K2 K16
  7. DES Supplementary Material Key # 1 2 3 4 5

    6 7 8 9 10 11 12 13 14 15 16 Left Shift 1 1 2 2 2 2 2 2 1 2 2 2 2 2 2 1
  8. DES Supplementary Material Permuted choice 1 Left Circular Shift Left

    Circular Shift Left Circular Shift 64-bit Key Permuted choice 2 Permuted choice 2 Permuted choice 2 56 bit 56 bit 56 bit 56 bit 56 bit 56 bit 48 bit 48 bit 48 bit K1 K2 K16
  9. DES Supplementary Material 14 17 11 24 1 5 3

    28 15 6 21 10 23 19 12 4 26 8 16 7 27 20 13 2 41 52 31 37 47 55 30 40 51 45 33 48 44 49 39 56 34 53 46 42 50 36 29 32
  10. DES Supplementary Material Initial permutation Round 1 Round 2 Round

    16 32 bit Swap Final permutation 64-bit Plain text 64-bit Cipher text 48 bit 48 bit 48 bit K1 K2 K16 64 bit 64 bit 64 bit 64 bit 64 bit
  11. DES Supplementary Material Initial permutation Round 1 Round 2 Round

    16 32 bit Swap Final permutation 64-bit Plain text 64-bit Cipher text 48 bit 48 bit 48 bit K1 K2 K16 64 bit 64 bit 64 bit 64 bit 64 bit
  12. DES Supplementary Material 58 50 42 34 26 18 10

    2 60 52 44 36 28 20 12 4 62 54 46 38 30 22 14 6 64 56 48 40 32 24 16 8 57 49 41 33 25 17 9 1 59 51 43 35 27 19 11 3 61 53 45 37 29 21 13 5 63 55 47 39 31 23 15 7
  13. DES Supplementary Material Initial permutation Round 1 Round 2 Round

    16 32 bit Swap Final permutation 64-bit Plain text 64-bit Cipher text 48 bit 48 bit 48 bit K1 K2 K16 64 bit 64 bit 64 bit 64 bit 64 bit
  14. DES Supplementary Material − − Expansion Permutation XOR S-Box Permutation

    XOR 32 bit 48 bit 48 bit 48 bit 32 bit 32 bit 32 bit 32 bit 32 bit 32 bit
  15. DES Supplementary Material − − Expansion Permutation XOR S-Box Permutation

    XOR 32 bit 48 bit 48 bit 48 bit 32 bit 32 bit 32 bit 32 bit 32 bit 32 bit
  16. DES Supplementary Material 1 2 3 4 5 6 7

    8 9 10 11 12 13 14 15 16 32 1 2 3 4 5 4 5 6 7 8 9 8 9 10 11 12 13 12 13 14 15 16 17 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 16 17 18 19 20 21 20 21 22 23 24 25 24 25 26 27 28 29 28 29 30 31 23 1 24 bit 24 bit 16 bit 16 bit
  17. DES Supplementary Material 32 1 2 3 4 5 4

    5 6 7 8 9 8 9 10 11 12 13 12 13 14 15 16 17 16 17 18 19 20 21 20 21 22 23 24 25 24 25 26 27 28 29 28 29 30 31 32 1
  18. DES Supplementary Material − − Expansion Permutation XOR S-Box Permutation

    XOR 32 bit 48 bit 48 bit 48 bit 32 bit 32 bit 32 bit 32 bit 32 bit 32 bit
  19. DES Supplementary Material 24 bit 24 bit 16 bit 16

    bit S-Box 1 S-Box 2 S-Box 3 S-Box 4 S-Box 5 S-Box 6 S-Box 7 S-Box 8
  20. DES Supplementary Material 0 1 2 . . . 15

    0 1 2 3 S-Box 6 bits 4 bits
  21. DES Supplementary Material  S-Box 1 0 1 2 3

    4 5 6 7 8 9 10 11 12 13 14 15 0 14 4 13 1 2 15 11 8 3 10 6 12 5 9 0 7 1 0 15 7 4 14 2 13 1 10 6 12 11 9 5 3 8 2 4 1 14 8 13 6 2 11 15 12 9 7 3 10 5 0 3 15 12 8 2 4 9 1 7 5 11 3 14 10 0 6 13
  22. DES Supplementary Material  S-Box 2 0 1 2 3

    4 5 6 7 8 9 10 11 12 13 14 15 0 15 1 8 14 6 11 3 4 9 7 2 13 12 0 5 10 1 3 13 4 7 15 2 8 14 12 0 1 10 6 9 11 5 2 0 14 7 11 10 4 13 1 5 8 12 6 9 3 2 15 3 13 8 10 1 3 15 4 2 11 6 7 12 0 5 14 9
  23. DES Supplementary Material  S-Box 3 0 1 2 3

    4 5 6 7 8 9 10 11 12 13 14 15 0 10 0 9 14 6 3 15 5 1 13 12 7 11 4 2 8 1 13 7 0 9 3 4 6 10 2 8 5 14 12 11 15 1 2 13 6 4 9 8 15 3 0 11 1 2 12 5 10 14 7 3 1 10 13 0 6 9 8 7 4 15 14 3 11 5 2 12
  24. DES Supplementary Material  S-Box 4 0 1 2 3

    4 5 6 7 8 9 10 11 12 13 14 15 0 7 13 14 3 0 6 9 10 1 2 8 5 11 12 4 15 1 13 8 11 5 6 15 0 3 4 7 2 12 1 10 14 9 2 10 6 9 0 12 11 7 13 15 1 3 14 5 2 8 4 3 3 15 0 6 10 1 13 8 9 4 5 11 12 7 2 14
  25. DES Supplementary Material  S-Box 5 0 1 2 3

    4 5 6 7 8 9 10 11 12 13 14 15 0 2 12 4 1 7 10 11 6 8 5 3 15 13 0 14 9 1 14 11 2 12 4 7 13 1 5 0 15 10 3 9 8 6 2 4 2 1 11 10 13 7 8 15 9 12 5 6 3 0 14 3 11 8 12 7 1 14 2 13 6 15 0 9 10 4 5 3
  26. DES Supplementary Material  S-Box 6 0 1 2 3

    4 5 6 7 8 9 10 11 12 13 14 15 0 12 1 10 15 9 2 6 8 0 13 3 4 14 7 5 11 1 10 15 4 2 7 12 9 5 6 1 13 14 0 11 3 8 2 9 14 15 5 2 8 12 3 7 0 4 10 1 13 11 6 3 4 3 2 12 9 5 15 10 11 14 1 7 6 0 8 13
  27. DES Supplementary Material  S-Box 7 0 1 2 3

    4 5 6 7 8 9 10 11 12 13 14 15 0 4 11 2 14 15 0 8 13 3 12 9 7 5 10 6 1 1 13 0 11 7 4 9 1 10 14 3 5 12 2 15 8 6 2 1 4 11 13 12 3 7 14 10 15 6 8 0 5 9 2 3 6 11 13 8 1 4 10 7 9 5 0 15 14 2 3 12
  28. DES Supplementary Material  S-Box 8 0 1 2 3

    4 5 6 7 8 9 10 11 12 13 14 15 0 13 2 8 4 6 15 11 1 10 9 3 14 5 0 12 7 1 1 15 13 8 10 3 7 4 12 5 6 11 0 14 9 2 2 7 11 4 1 9 12 14 2 0 6 10 13 15 3 5 8 3 2 1 14 7 4 10 8 13 15 12 9 0 3 5 6 11
  29. DES Supplementary Material − − Expansion Permutation XOR S-Box Permutation

    XOR 32 bit 48 bit 48 bit 48 bit 32 bit 32 bit 32 bit 32 bit 32 bit 32 bit
  30. DES Supplementary Material 1 2 3 4 5 6 7

    8 9 10 11 12 13 14 15 16 16 7 20 21 29 12 28 17 1 15 23 26 5 18 31 10 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 2 8 24 14 32 27 3 9 19 13 30 6 22 11 4 25
  31. DES Supplementary Material 16 7 20 21 29 12 28

    17 1 15 23 26 5 18 31 10 2 8 24 14 32 27 3 9 19 13 30 6 22 11 4 25
  32. DES Supplementary Material Initial permutation Round 1 Round 2 Round

    16 32 bit Swap Final permutation 64-bit Plain text 64-bit Cipher text 48 bit 48 bit 48 bit K1 K2 K16 64 bit 64 bit 64 bit 64 bit 64 bit
  33. DES Supplementary Material 40 8 48 16 56 24 64

    32 39 7 47 15 55 23 63 31 38 6 46 14 54 22 62 30 37 5 45 13 53 21 61 29 36 4 44 12 52 20 60 28 35 3 43 11 51 19 59 27 34 2 42 10 50 18 58 26 33 1 41 9 49 17 57 25
  34. DES Supplementary Material Initial permutation Round 1 Round 2 Round

    16 32 bit Swap Final permutation 64-bit Plain text 64-bit Cipher text 48 bit 48 bit 48 bit K1 K2 K16 64 bit 64 bit 64 bit 64 bit 64 bit
  35. DES Supplementary Material facebook.com/mloey mohamedloey@gmail.com twitter.com/mloey linkedin.com/in/mloey mloey@fci.bu.edu.eg mloey.github.io

  36. DES Supplementary Material www.YourCompany.com © 2020 Companyname PowerPoint Business Theme.

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